CN101681747B - Electrical switch - Google Patents

Electrical switch Download PDF

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Publication number
CN101681747B
CN101681747B CN2007800408019A CN200780040801A CN101681747B CN 101681747 B CN101681747 B CN 101681747B CN 2007800408019 A CN2007800408019 A CN 2007800408019A CN 200780040801 A CN200780040801 A CN 200780040801A CN 101681747 B CN101681747 B CN 101681747B
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CN
China
Prior art keywords
lever
contact
contacts
switch
main
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Active
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CN2007800408019A
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Chinese (zh)
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CN101681747A (en
Inventor
沃尔夫冈·聚斯
埃尔温·穆德斯
克劳斯-彼得·埃佩
拉尔夫·威兰
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ABB AB
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ABB AB
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/12Automatic release mechanisms with or without manual release
    • H01H71/46Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/50Manual reset mechanisms which may be also used for manual release
    • H01H71/52Manual reset mechanisms which may be also used for manual release actuated by lever

Abstract

The invention relates to an electrical switch with a main current path, in which a main contact point (10) is located, with a secondary current path having an isolating contact point (37) onto which the current is commutated from the main current path in the event of a short circuit, with a switching lock with which the main contact point (10) and the isolating contact point (37) can be activated, and with a switch knob (24). The main and isolating contact points are opened by using a control lever (17). One end thereof is joined, using an articulated link via a pivot pin (18), to a first intermediate lever (19) which forms a linked chain with a second intermediate lever (21) and the switch knob (24). An opening spring (51) engages on the pivot pin (18) connecting the control lever (17) and the first intermediate lever (19) and acts upon the control lever (17), via the pivot pin (18), in the opening direction of the main contact point (10). The force of the opening spring (51) is introduced to the pivot pin (18) in such a way that a first, smaller partial force (56) acts on the latching point (31), and a second, larger partial force (57) acts on the control lever (17).

Description

Electric switch
Technical field
The present invention relates to a kind of electric switch.
Background technology
For example in DE 19526591A1 and DE 19526592C2, this switch has been described.
It has main current path, and main contacts is arranged in the main current path, and this main contacts comprises fixed contact and moving contact, and wherein moving contact is fixed on the lever arm of contact, and this contact lever arm is supported in the rotating shaft of invariant position swingably.
In addition; The switch of this type has the secondary current path; Separated contacts (being also referred to as auxiliary contact) is arranged in the secondary current path, and separated contacts comprises fixed contact and moving contact equally, and wherein moving contact is fixed on the contact shoe in the rotating shaft that is supported on invariant position swingably; Under short-circuit conditions, electric current is converted to the secondary current path from main current path.
Main contacts and auxiliary contact can utilize switch lever and the operation of switch locking piece, and wherein each member supporting of switch locking piece is in grillage.
The contact lever is a double-arm lever; The arm relative with moving contact of this double-arm lever is by the control lever effect; The other end of this double-arm lever through rotating journal with first in the middle of lever hinged, the other end of middle lever be hinged on switch lever on second the centre lever be connected.
The hinging journal of lever passes the slotted hole of the pawl lever that supports rotationally in the middle of connecting two.
Be provided with the dropout lever in addition, pawl lever and dropout lever form meshing point.
At dropout lever place, trigger unit (being the thermomagnetion trigger mechanism) acts on the switch locking piece, and wherein the layout of lever and interaction make and when connecting once more, realize the switching sequence that auxiliary contact is leading and main contacts lags behind.
The contact stage clip acts on the contact lever and moving contact is pressed onto on the fixed contact with certain contact force.
In known switch of the same type, the cut-out spring that is the stage clip form acts on control lever and overcomes contact stage clip power exerts pressure to control lever towards the main contacts open position.Cut-out spring takes up space very big at this moment, and its spring force always acts on control lever with equidirectional.At this moment, even cut-out spring must still can apply very big power to control lever under the part decompression state, to overcome the power of contact stage clip.At this moment, the pressure of cut-out spring directly acts on meshing point, and limits the release force that must be threaded off by the realization that hot trigger mechanism produces.
Therefore, in known switch of the same type, following problem is arranged, promptly cut-out spring must satisfy two antipodal requirements.In order to guarantee reliable disconnection, its power that is applied on the control lever should be tried one's best greatly.And realizing reliable the dropout through hot trigger mechanism in order to guarantee, its power that is applied on the control lever should be as far as possible little.In known switch of the same type, take the half-way house that can't meet the demands fully always.
Summary of the invention
Therefore, task of the present invention is to improve the switch of the above-mentioned type, thereby control lever is applied big power and simultaneously meshing point applied little power.
According to the present invention, accomplish this task through a kind of electric switch, said electric switch comprises:
Main current path; Main contacts (10) is wherein arranged; This main contacts has moving contact (13) and fixed contact (11); The moving contact (13) of said main contacts (10) is fixed on the first arm (15) of the contact lever (12) in first rotating shaft (14) that is supported on invariant position swingably, and said contact lever (12) is a double-arm lever, and second arm (16) relative with moving contacts said main contacts (10) (13) this double-arm lever acted on by control lever (17); The secondary current path; It has separated contacts (37); This separated contacts has moving contact (36) and fixed contact (38); The moving contact of said separated contacts (36) is fixed on the contact shoe (34) in second rotating shaft (33) that is supported on invariant position swingably, and electric current will be transformed into said secondary current path from said main current path under short-circuit conditions; Each member supporting in grillage and can operate the switch locking piece of said main contacts (10) and said separated contacts (37); Can operate the switch lever (24) of said switch locking piece and said main contacts and said separated contacts; The other end of said control lever (17) is hinged through lever (19) in the middle of the rotating journal (18) and first; Said in the middle of first lever (19) the other end be hinged on second on the said switch lever (24) in the middle of lever (21) hinged, mobile in the slotted hole (26) of the pawl lever (27) that supports rotationally in order to connect in the middle of said first in the middle of the lever (19) and said second hinging journal (20) of lever (21); Dropout lever (30); Said pawl lever (27) constitutes meshing point (31) with said dropout lever; It is characterized in that; Cut-out spring (51) acts on the said rotating journal (18) of the connection said control lever (17) and the said first middle lever (19) and said control lever (17) is imposed the power that said main contacts (10) is broken off through said rotating journal (18); The power of wherein said cut-out spring (51) passes to said rotating journal (18), makes less first component (56) act on said meshing point (31), and bigger second component (57) acts on said control lever (17).
In other words; According to the present invention; Cut-out spring acts on the rotating journal of the connection control lever and the first middle lever and control lever is imposed the power that main contacts is broken off through rotating journal; Wherein the power of cut-out spring passes to rotating journal, makes the first less component act on meshing point, and the second bigger component acts on control lever.
In other words, according to the present invention, cut-out spring no longer directly acts on control lever, but acts on the rotating journal that connects the control lever and the first middle lever.Like this, can select the power conduction orientation and can make the power of cut-out spring be broken down into two component, one of them is towards the meshing point directive effect, and another is towards breaking off directive effect in control lever.At this moment, the power conduction makes towards first component of meshing point directive effect as far as possible little, and second component that only acts on control lever is big as far as possible.
According to a kind of particularly advantageous execution mode of the present invention, cut-out spring is a torsion spring, and its first supporting leg is supported on the point of invariant position, realizes the power transmission to rotating journal through its second supporting leg.
Torsion spring is the flexural spring of reeling on the space, and it has linear moment characteristic curve.Power conduction or moment conduction realize through the supporting leg of going up end to end at spring.Torsion spring can adapt to the spatial depiction of current existence in every way.In other words, through realizing the present invention, can be utilized in the confined space in the electric switch of the present invention very fully with torsion spring.
Very advantageously be a kind of like this execution mode, wherein torsion spring is around the rotating shaft of the invariant position of the contact shoe of separated contacts.So the effect of work arbor is played in the rotating shaft of contact lever, torsion spring abuts on the work arbor with its endoporus and is able to thus and keeps.The rotating shaft of the contact shoe of separated contacts obtains additional function thus, need not for torsion spring independent maintaining body to be set.
Description of drawings
Accompanying drawing in conjunction with the expression embodiments of the invention specifies and describes the present invention and other decision design of the present invention and improvement project, wherein:
The switch locking piece of the switch of the present invention that Fig. 1 representes to be in the close position;
Switch locking piece shown in Figure 1 when Fig. 2 representes main contacts and auxiliary contact disconnection.
Embodiment
The switch locking piece has main contacts 10, and it comprises fixed contact 11 and is fixed on the moving contact 13 on the contact lever 12.
Contact lever 12 is supported in the rotating shaft 14 of invariant position rotationally and is the form of double-arm lever; Its first arm 15 is provided with moving contact 13; Its second arm 16 is by control lever 17 effects, and control lever makes contact lever 12 move to open position (referring to Fig. 2) from on-position (referring to Fig. 1).
Unshowned contact stage clip acts on the contact lever and causes moving contact 13 to be pressed onto on the fixed contact 11 with the contact force of representing with arrow 50.
Lever 19 linked to each other in the middle of control lever 17 passed through rotating journal 18 and first, and the first middle lever 19 is hinged through lever 21 in the middle of hinging journal 20 and second, and the second middle lever 21 is hinged on the jointed shaft 23 on the switch lever 24 with switch handle 25.Switch lever 24 is supported on the axle 22 of invariant position.
Hinging journal 20 can move in the slotted hole 26 of pawl lever 27.Pawl lever 27 can invariant position ground 28 rotational support around the shaft.Pawl lever 27 constitutes meshing point 31 with the dropout lever 30 of axle 29 rotational support that can support around invariant position ground.
Dropout lever 30 constitutes with the form of double-arm lever, on its first arm 301 near meshing point, is provided with projection 302, and this projection constitutes meshing point 31 with the projection 271 of pawl lever 27.On second arm 303 away from meshing point 31 of dropout lever 30, be provided with projection 304.The hot trigger mechanism of switch is for example through acting on projection 304 at this unshowned slide block.The effect of the hot trigger mechanism lever 30 that causes threading off clockwise rotates in the dropout process, the result, and projection 302 is decontroled projections 271, and disengage from point 31 thus.At this moment, hot trigger mechanism must overcome the power that projection 271 acts on projection 302 at least, so this power is called as release force here.
Between the line and main contacts 10 of the axle 22 of the invariant position of the rotating shaft 28 of the invariant position that connects pawl lever 27 and switch lever 24, be provided with the rotating shaft 33 of invariant position, in this rotating shaft 33, be supported with the contact shoe 34 that is loaded with contact lever 35.
On the free end of contact lever 35, be fixed with the moving contact 36 of separated contacts 37.Separated contacts 37 has fixed contact 38, and fixed contact 38 can the invariant position and the fixed contact 11 continuous (line 138 expressions that with dashed lines draw) of ground with main contacts 10 that conduct electricity.
Contact shoe 34 constitutes with the form of both arms bearing, on the first arm 39 of main contacts 10, is provided with contact lever 35 and moving contact 36 at it.On second arm 40 that stretches out round about, has extension 49.
Lug boss 48 is molded on the control lever 17, and this lug boss 48 reacts on contact shoe 34 with extension 49 1, and contact shoe 34 has following structure, that is: in the disconnection process of main contacts 10, separated contacts 37 is broken off after main contacts 10 breaks off; When the closing course of main contacts 10, separated contacts 37 is closed closed before at main contacts 10.
Hinging journal 20 representes with mark 46 that with the line of jointed shaft 23 it extends below line 47 on the open position of Fig. 2, line 47 extends between the axle 22 of the invariant position of hinging journal 20 and switch lever 24.This is switching mechanism first settling position on open position.
At the on-position according to Fig. 1, line 46 extends above the axle 22 of invariant position, and this is switching mechanism second settling position on the on-position.
Torsion spring 51 is around the rotating shaft 33 of the invariant position of contact shoe 34.First supporting leg 52 of torsion spring 51 is supported on the constant point 53 of fixed-site.The constant point 53 of fixed-site can be the protruding or groove on the inner surface of switch shell wall, also can be the strong point on the grillage of switch locking piece.
The free end of second supporting leg 54 of torsion spring 51 is supported on the rotating journal 18, and this rotating journal connects the control lever 17 and the first middle lever 19.Therefore, through second supporting leg 54 of torsion spring 51, spring force passes to axle journal 18.The contact point of spring force between supporting leg 54 and rotating journal 18 perpendicular to second supporting leg 54 passed to axle journal, and this spring force is represented with arrow 55.This power is decomposed into first less component of representing with arrow 56 that imports lever 19 in the middle of first into and the second bigger component of representing with arrow 57 that causes control lever 17 on main contacts 10 disconnection directions, to move.
The first less component 56 of only passing to lever 19 in the middle of first has produced the release force on the meshing point 31.This power is less, and therefore hot trigger mechanism also only needs to produce the triggering power of projection 304 very little, that act on dropout lever 30.
The second bigger component 57 can overcome contact force 50 and break off main contacts 10 and separated contacts 37 through control lever 17.In case of necessity, can assist second component 57 of torsion spring 51 through the power of another extension spring, extension spring is hinged on the control lever 17 on the one hand, is hinged on the other hand on second arm 40 of contact shoe 34., said another extension spring is not shown here, but its function has been described in above-mentioned document DE 19526591 and DE 19526592.Said another extension spring neither emphasis of the present invention, and is optional concerning switch performance function of the present invention.
In other words, dropout lever 30 will be swung clockwise, under the situation that overcomes less release force 56, decontroled meshing point 31 this moment.So, hinging journal in the slotted hole 26 of pawl lever 27 20 is decontroled, the fixed pan that control lever 17 can limit through the oppressed rotating shaft of leaving the fixed contact 11 of main contacts 10 and contact lever 12 14 of bigger second component 57.At this moment, control lever 17 is stirred second arm 16 of contact lever 12 and is made second arm overcome contact force 50 counter-clockwise swings through pilot pin 58, the result, and main contacts 10 is disconnected.
24 that constitute by lever 21 in the middle of the lever in the middle of first 19, second and switch lever, through the hinging journal 20 that in slotted hole 26, extends configuration structure with the hinge of pawl lever 27 mating reactions; Switch lever 24 is clockwise rotated; Make pawl lever 27 swing in its position of engagement at once again; Thereby when hot trigger mechanism is cooled again and has returned when removing its initial position, meshing point 31 is locked again.This position has been shown in Fig. 2.
From position shown in Figure 2,, can realize the connection once more of switching mechanism through rotating counterclockwise of switch knob 25 and then switch lever 24.At this moment, torsion spring 51 also is tensioned again subsequently.
The Reference numeral list
The 10-main contacts;
The fixed contact of 11-main contacts;
The contact lever of 12-main contacts;
The moving contact of 13-main contacts;
The 14-rotating shaft;
The first arm of 15-contact lever;
Second arm of 16-contact lever;
The 17-control lever;
The 18-rotating journal;
Lever in the middle of the 19-first;
The 20-hinging journal;
Lever in the middle of the 21-second;
The axle of 22-invariant position;
The 23-jointed shaft;
The 24-switch lever;
The 25-switch knob;
The 26-slotted hole;
The 27-pawl lever;
The 271-projection;
The rotating shaft of 28-pawl lever;
The axle of 29-dropout lever;
30-dropout lever;
The first arm of 301-dropout lever;
The 302-projection;
Second arm of 303-dropout lever;
The 304-projection;
The 31-meshing point;
The 33-contact shoe
The rotating shaft of 34-invariant position;
The 34-contact shoe;
The contact lever of 35-separated contacts;
The moving contact of 36-separated contacts;
The 37-separated contacts;
The fixed contact of 38-separated contacts;
The 138-line;
The first arm of 39-contact shoe;
Second arm of 40-contact shoe;
46-line 20-23;
47-line 20-22;
The 48-lug boss;
The 49-extension;
The 50-contact force;
The 51-torsion spring, cut-out spring;
First supporting leg of 52-torsion spring;
The point of 53-invariant position;
Second supporting leg of 54-torsion spring;
The 55-spring force;
56-first component;
57-second component;
The 58-pilot pin;

Claims (3)

1. electric switch comprises:
Main current path; Main contacts (10) is wherein arranged; This main contacts has moving contact (13) and fixed contact (11); The moving contact (13) of said main contacts (10) is fixed on the first arm (15) of the contact lever (12) in first rotating shaft (14) that is supported on invariant position swingably, and said contact lever (12) is a double-arm lever, and second arm (16) relative with moving contacts said main contacts (10) (13) this double-arm lever acted on by control lever (17);
The secondary current path; It has separated contacts (37); This separated contacts has moving contact (36) and fixed contact (38); The moving contact of said separated contacts (36) is fixed on the contact shoe (34) in second rotating shaft (33) that is supported on invariant position swingably, and electric current will be transformed into said secondary current path from said main current path under short-circuit conditions;
Each member supporting in grillage and can operate the switch locking piece of said main contacts (10) and said separated contacts (37);
Can operate the switch lever (24) of said switch locking piece and said main contacts and said separated contacts; The other end of said control lever (17) is hinged through lever (19) in the middle of the rotating journal (18) and first; Said in the middle of first lever (19) the other end be hinged on second on the said switch lever (24) in the middle of lever (21) hinged, mobile in the slotted hole (26) of the pawl lever (27) that supports rotationally in order to connect in the middle of said first in the middle of the lever (19) and said second hinging journal (20) of lever (21);
Dropout lever (30), said pawl lever (27) constitutes meshing point (31) with said dropout lever,
It is characterized in that; Cut-out spring (51) acts on the said rotating journal (18) of the connection said control lever (17) and the said first middle lever (19) and said control lever (17) is imposed the power that said main contacts (10) is broken off through said rotating journal (18); The power of wherein said cut-out spring (51) passes to said rotating journal (18); Make less first component (56) act on said meshing point (31), bigger second component (57) acts on said control lever (17).
2. electric switch as claimed in claim 1 is characterized in that, said cut-out spring (51) is torsion spring (51), the point (53) that its first supporting leg (52) is supported on invariant position go up and through its second supporting leg (54) to said rotating journal (18) conductance.
3. electric switch as claimed in claim 2 is characterized in that, said torsion spring (51) is around said second rotating shaft (33).
CN2007800408019A 2006-11-03 2007-10-26 Electrical switch Active CN101681747B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006051807.1 2006-11-03
DE102006051807A DE102006051807B8 (en) 2006-11-03 2006-11-03 Electric switch
PCT/EP2007/009296 WO2008052702A1 (en) 2006-11-03 2007-10-26 Electrical switch

Publications (2)

Publication Number Publication Date
CN101681747A CN101681747A (en) 2010-03-24
CN101681747B true CN101681747B (en) 2012-07-18

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CN2007800408019A Active CN101681747B (en) 2006-11-03 2007-10-26 Electrical switch

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US (1) US20100072049A1 (en)
EP (1) EP2097918B1 (en)
CN (1) CN101681747B (en)
AT (1) ATE504935T1 (en)
CA (1) CA2667500A1 (en)
DE (2) DE102006051807B8 (en)
PL (1) PL2097918T3 (en)
WO (1) WO2008052702A1 (en)

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JP2011181469A (en) * 2010-03-04 2011-09-15 Ricoh Co Ltd Switch operation device, interlock mechanism with the same, and image forming device
CN201918333U (en) 2010-05-12 2011-08-03 Abb股份公司 Switch installation device
CN102568922B (en) * 2010-12-30 2015-02-11 中国船舶重工集团公司第七一三研究所 Load signal generating mechanism
CN102254755B (en) * 2011-06-28 2013-10-16 法泰电器(江苏)股份有限公司 Operation mechanism of circuit breaker
US9403591B2 (en) * 2013-07-23 2016-08-02 Mason Electric Co. Landing gear control system
CN107293457A (en) * 2016-04-12 2017-10-24 上海良信电器股份有限公司 A kind of contact system structure-improved of breaker
AU2022399749A1 (en) * 2021-12-02 2023-11-09 Chint Low Voltage Electrical Technology Co., Ltd. Circuit breaker
CN116230458A (en) * 2021-12-02 2023-06-06 上海正泰智能科技有限公司 Operating mechanism and switching device

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CN1365506A (en) * 2000-03-17 2002-08-21 通用电气公司 High energy closing mechanism for circuit breakers
DE10222360A1 (en) * 2003-02-07 2003-12-04 Hager Electro Gmbh Line and/or equipment excess current/short circuit protection switch has first separation point, magnet mechanism and slower movement mechanism in series in main current path from input to output

Also Published As

Publication number Publication date
PL2097918T3 (en) 2011-09-30
US20100072049A1 (en) 2010-03-25
CA2667500A1 (en) 2008-05-08
CN101681747A (en) 2010-03-24
WO2008052702A1 (en) 2008-05-08
DE502007006903D1 (en) 2011-05-19
DE102006051807B3 (en) 2008-03-27
EP2097918A1 (en) 2009-09-09
ATE504935T1 (en) 2011-04-15
DE102006051807B8 (en) 2008-06-26
EP2097918B1 (en) 2011-04-06

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